• ## Wheatstone Bridge for strain gauge – Working – Operational characteristics

### Thermal Conductivity Gas Measurement

Thermal Conductivity Gas Detectors  All gases possess varying degrees of ability to conduct heat.  In order to have a means of comparing the gases’ abilities, a coefficient has been assigned to each gas according to its capacity to retain heat.  These coefficients…

### Tool to calculate Span and Input/Output relation of an Instrument Transmitter Using LRV and URVURV

Instrument Transmitter Span and Input/Output relation Calculator This tool is used to calculate the Input and output relation from LRV and URV. How to use this tool? You need the following information to calculate the Span and Input/Output relation. LRV – Low Range…

### What is Oxidation-Reduction Potential (ORP) ?

What is ORP (Oxidation – Reduction Potential) ?ORP electrodes measure the voltage across a circuit formed by the measuring metal half cell and the reference half cell. When the ORP electrode is placed in the presence of oxidizing or reducing agents, electrons…

### Optical Pyrometer – Temperature Measurement

Optical Pyrometer  An optical pyrometer will measure temperature from a distance. Optical pyrometer is a filament that has its power supply and as you adjust the resistance the on it the color will change on the filament.Now the idea is when you…

### Radiation Pyrometer – Temperature Measurement

What is Infrared ? Infrared (IR)  portion  of  the  spectrum  spans  Wavelengths between  0. 7  t  1000  microns.  Based on  the principle  that  all objects  warmer than  absolute zero  (  0 ° K)  emit  energy  some where  in  that range. Infrared  thermometers…

### Introduction to DCS (Distributed Control System )

What is Distributed Control System ?There are many definitions of distributed control, but the basic concept is always the same: divide a large application into multiple smaller subsystems, each of which carries out a portion of the application, and allow these subsystems…

### Vibration Measurement – Accelerometer

AccelerometerAccelerometers are a piezo-electronic (crystal) device. A pre- loaded crystal is charged with current and as the crystal is compressed or de-compressed by vibration an output proportional to g’s (gravity) is provided.  A “g” is equal to 9.80 meters/second2 or one (1)…

### Introduction To Vibration Measurement

Measurement Type Only measurements of the same type can be compared. Bearing Cap or Case Vibration cannot be directly compared to Shaft Relative or Shaft Absolute and visa versa.1). Case Absolute Case or Bearing Cap Absolute is the measurement of the Case or…

### Dissolved Oxygen Measurement

Dissolved Oxygen Measurement One of the most important measurements in the determination of the health of a body of water is its dissolved oxygen content. The quantity of dissolved oxygen in water is normally expressed in parts per million (ppm) by weight and…

### Position Transducer – Displacement Measurement

How Position Transducers WorkPosition transducers convert mechanical motion into an electrical signal that may be metered, recorded, or transmitted. Position transducers consist of a stainless steel extension cable wound on a threaded drum that is coupled to a precision rotary sensor such…